Problem loading video files: clicking on avi/mpg file freezes my system for about 2 min before open it
 

I use BSplayer to play video files under Win98.
It worked fine, but from some time I have this annoying problem:
If I open a video file or click on it or just open a directory where
it is stored, my system freezes for about 2 - 5 minutes.
Then the file is played correctly, and so for every video file I'll
play after it. So it happens just the first time I am going to play a
video file.
It seems like my system is checking something and during this period I
cannot do nothing.
Most interesting, my audio files play without problems in the Winamp.
So only video files are affected...
I am suspecting about the Bittorent, which I have uninstalled already.
Maybe it has changed some of my configuration, but I'm not sure....
Do you have any suggestion?